This is not a typical characteristic of rat feces. It is possible that the droppings belong to another type of rodent or similar-sized animal. It is also possible that these droppings are from one specific rat or other animal with some kind of digestive system affliction.

These droppings are most likely lizard droppings and they are colored this way because lizards get rid of feces and urine through the same opening in the body. The white tip is caused by uric acid crystals.

Rat droppings are black/brown droppings. They are similiar to rabbit droppings. If you find them in your residence, look around in the cupboards to see if there are any disturbed containers and set traps if so. Rats droppings are nothing to ignore.

of the droppings that I've seen, they did not have white tips, so, not in my experience, but i am not an expert of rodent droppings. I would perform a search onlinwe to see images of Rat droppings and I believe you will find that I am correct.